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IB17 11_5070_12/5RP © UCLES 2017 [Turn over

*8408139347*

Cambridge International Examinations Cambridge Ordinary Level

CHEMISTRY 5070/12

Paper 1 Multiple Choice October/November 2017

1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB recommended)

READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE IN ANY BARCODES. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 16. Electronic calculators may be used.

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© UCLES 2017 5070/12/O/N/17

1 A mixture of sand and sodium chloride can be separated in three steps.

Step 1 is to add water to the mixture.

The diagram shows step 2 and step 3.

Where is pure sodium chloride collected?

step 2 step 3

heat

A

CD

Bfilter paperand funnel

evaporatingdish

2 The results of two tests on solution X are shown.

reagent added observation on adding a few drops of reagent

observation on adding an excess of reagent

aqueous sodium hydroxide white precipitate precipitate dissolves

aqueous ammonia white precipitate precipitate remains

Which ion is present in solution X?

A Al 3+ B Ca2+ C Cu2+ D Zn2+

3 Which diagram shows the arrangement of particles inside a balloon containing a mixture of the

gases nitrogen and oxygen?

A B C D

nitrogen atomoxygen atom

key

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4 A student follows the rate of the reaction between marble chips, CaCO3, and dilute hydrochloric acid.

CaCO3 + 2HCl → CaCl 2 + CO2 + H2O

Which diagrams show apparatus that is suitable for this experiment?

measuringcylinder

hydrochloricacid

marble chips

marble chips

hydrochloricacid

marble chips

1 2

balancewater

43

gas syringe

marble chips

hydrochloricacid burette

hydrochloricacid burette

looseplug

A 1 and 2 only B 1 and 3 C 1 and 4 only D 1, 2 and 4

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5 A chemist wishes to separate and identify a mixture of substances using paper chromatography. The diagram shows the apparatus used. The solvent is water.

solvent

The solvent front is allowed to reach the top of the paper before the chemist removes the paper from the solvent.

Which problem does this cause?

A This causes the spot nearest the bottom of the paper to catch up with the spot above it.

B This makes it impossible to calculate Rf values.

C This makes it impossible to use a locating agent.

D This results in a safety hazard caused by solvent fumes. 6 Which particle contains the same number of both neutrons and electrons?

A +24020 Ca B +224

12Mg C −F199 D −232

16 S 7 Which statement is correct for all metals?

A They are hard and brittle.

B They are made up of a lattice of positive and negative ions.

C They conduct electricity by movement of electrons.

D They conduct electricity by movement of ions.

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8 X represents the element of atomic number 8 and Y represents the element of atomic number 19.

The two elements react together to form a compound.

Which row is correct for the compound formed?

formula type of bonding

A Y2X covalent

B Y2X ionic

C X2Y covalent

D X2Y ionic 9 The empirical formula of a liquid compound is C2H4O.

To find the empirical formula, it is necessary to know

A the density of the compound.

B the percentage composition by mass of the compound.

C the relative molecular mass of the compound.

D the volume occupied by 1 mole of the compound. 10 25.0 g of hydrated copper(II) sulfate crystals are heated to produce anhydrous copper(II) sulfate

and water vapour.

CuSO4.5H2O(s) → CuSO4(s) + 5H2O(g)

What is the mass of anhydrous copper(II) sulfate formed? [Mr: CuSO4, 160; H2O, 18]

A 9.0 g B 16.0 g C 22.5 g D 25.0 g 11 Which sample contains the most atoms?

A 0.5 moles of water

B 1.0 moles of carbon dioxide

C 1.0 moles of methane

D 2.0 moles of hydrogen chloride 12 The relative atomic mass of chlorine is 35.5.

What is the mass of 2 moles of chlorine gas?

A 17.75 g B 35.5 g C 71 g D 142 g

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13 One mole of an organic compound, Q, is completely burnt in oxygen and produces exactly three moles of water.

Which compound is Q?

A butane, C4H10

B ethanol, C2H5OH

C propane, C3H8

D propanol, C3H7OH 14 In an experiment, 1 mol of powdered copper and 1 mol of powdered zinc are placed in a flask.

Dilute acid, containing 1 mol of acid, is added to the flask.

The flask is left until all the reactions, if any, are complete.

Which diagram shows the result of the experiment?

A

colourlessneutralsolution

1 mol of copper

B

blueneutralsolution

0.5 mol of copper +0.5 mol of zinc

C

blueneutralsolution

1 mol of zinc

D

colourlessacidic

solution

1 mol of copper +1 mol of zinc

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15 A simple cell can be made using two different metals as the electrodes and an aqueous solution as the electrolyte.

Which statements about simple cells are correct?

1 A greater voltage is produced using magnesium and silver than using magnesium

and copper.

2 The electrolyte is an aqueous solution containing both positive and negative ions.

3 The more reactive metal will release electrons.

A 1, 2 and 3 B 1 and 3 only C 1 only D 2 and 3 only 16 Magnesium can be produced by electrolysis of molten magnesium chloride, MgCl 2.

What are the equations for the reactions that occur at the positive electrode and at the negative electrode?

positive electrode negative electrode

A 2Cl – → Cl 2 + 2e– 2H+ + 2e– → H2

B Cl 2 + 2e– → 2Cl – Mg2+ + 2e– → Mg

C 2Cl – → Cl 2 + 2e– Mg2+ + 2e– → Mg

D 2Cl – → Cl 2 + 2e– Mg2+ + 2e– → 2Mg

17 Three different solutions were electrolysed using inert electrodes.

solution 1 aqueous sodium chloride

solution 2 concentrated hydrochloric acid

solution 3 dilute sulfuric acid

Which solutions produce hydrogen at the negative electrode?

A 1, 2 and 3 B 1 and 2 only C 1 only D 2 and 3 only 18 Compound Y reacts with oxygen. This reaction has a positive enthalpy change of reaction, ∆H.

What information can be deduced about Y and its reaction with oxygen?

A Compound Y can be used as a fuel.

B Compound Y could be a hydrocarbon.

C In the reaction the energy needed to break bonds is greater than the energy released when bonds are made.

D In the reaction the products are at a lower energy level than the reactants.

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19 The formation of liquid water from hydrogen and oxygen may occur in three stages.

1 2H2(g) + O2(g) → 4H(g) + 2O(g)

2 4H(g) + 2O(g) → 2H2O(g)

3 2H2O(g) → 2H2O(I)

Which stages are endothermic?

A 1, 2 and 3 B 1 only C 2 only D 3 only 20 Sulfur trioxide is produced by the following reaction. 2SO2(g) + O2(g) 2SO3(g) ∆H = –195 kJ

Which change in conditions would produce a greater amount of SO3 at equilibrium?

A adding a catalyst

B increasing the pressure

C increasing the temperature

D removing some SO2 and O2

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21 Magnesium reacts with dilute sulfuric acid.

Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)

Two experiments were carried out.

experiment 1 24.0 g of magnesium was reacted with 100 cm3 of 1.0 mol / dm3 sulfuric acid.

experiment 2 24.0 g of magnesium was reacted with 50 cm3 of 2.0 mol / dm3 sulfuric acid.

In each experiment the volume of hydrogen was measured at various times. The results were plotted on a graph.

Which graph is correct?

volume ofhydrogen

time

A

00

volume ofhydrogen

time

B

00

volume ofhydrogen

time

C

00

volume ofhydrogen

time

D

00

key

experiment 1

experiment 2

22 Which statement is correct for both aluminium and iron?

A Both form 2+ ions.

B Both have amphoteric oxides.

C The manufacture of both metals involves the reduction of the metal ions.

D They are both normally manufactured by electrolysis.

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23 A household cleaning compound is used to remove calcium carbonate from bathroom surfaces.

The compound reacts with the calcium carbonate to form a soluble salt, carbon dioxide and water.

What is the pH of this cleaning compound?

A pH 2 B pH 7 C pH 10 D pH 14 24 Dilute hydrochloric acid is added separately to samples of copper, copper(II) oxide and

copper(II) carbonate.

Which row correctly shows whether copper(II) chloride is produced?

Cu CuO CuCO3

A key

B = copper(II) chloride produced

C = copper(II) chloride not produced

D 25 Which ions are present when hydrochloric acid has exactly neutralised aqueous sodium

hydroxide?

A Na+, Cl –, H+ and OH–

B Na+, Cl – and H+ only

C Na+ and Cl – only

D H+ and OH– only 26 Which experiment will result in the formation of a white precipitate?

A aqueous barium nitrate added to aqueous sodium chloride

B aqueous sodium carbonate added to aqueous calcium chloride

C carbon dioxide passed through aqueous potassium chloride

D dilute hydrochloric acid added to aqueous ammonia 27 Which statement about both the Group I and Group VII elements is correct?

A They conduct electricity when molten.

B They form covalent compounds when bonded to non-metals.

C They exist as diatomic molecules.

D When Group I elements combine with Group VII elements, ionic compounds form.

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28 The elements helium, argon and neon are noble gases.

Which statement is correct?

A All these elements have eight electrons in their outer shell.

B Argon is used to react with impurities in the manufacture of steel.

C Helium is used in balloons as it is more dense than air.

D Neon is used in light bulbs to give an inert atmosphere. 29 Which row shows the correct catalyst for each industrial process?

manufacture of

sulfuric acid manufacture of

ammonia manufacture of

margarine

A nickel iron vanadium(V) oxide

B nickel vanadium(V) oxide iron

C vanadium(V) oxide iron nickel

D vanadium(V) oxide nickel iron 30 In the solid state, germanium has the same structure as diamond.

What is the likely melting point of germanium?

A above 800 °C

B between 100 °C and 800 °C

C 100 °C

D below 100 °C 31 Aluminium is a metal that is often used to make caps for bottles. When thrown away and buried in

the soil, the caps do not corrode.

Why is this?

A Aluminium does not react with acids.

B Aluminium does not react with alkalis.

C Aluminium is alloyed with other metals.

D Aluminium is protected by a layer of oxide.

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32 Which statement about Group I metals is correct?

A They are hard compared with most other metals.

B They form coloured compounds.

C They have high densities compared with most other metals.

D They only form ions with a charge of +1. 33 CFC compounds were used as aerosol propellants. The structure of one CFC compound is

shown.

F

CF

F

C H

H

Cl

Which element in this compound causes a depletion of ozone in the atmosphere?

A carbon

B chlorine

C fluorine

D hydrogen 34 Dry air is a mixture of gases of which 99% is nitrogen and oxygen.

What is the main constituent of the remaining 1%?

A argon

B helium

C hydrogen

D water vapour 35 Why is chlorine added to the water supply?

A Chlorine is used to desalinate the water.

B Chlorine kills bacteria that may be present in the water.

C Chlorine precipitates solids that may be present in the water.

D Chlorine removes tastes and odours from the water.

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36 When the alcohol of molecular formula C4H10O is oxidised, what is the molecular formula of the acid formed?

A C4H12O2 B C4H10O2 C C4H8O2 D C4H6O2 37 The diagrams show the structures of five hydrocarbons.

1

H C C C

H

H

H

H

H

H

H

H

H

H

C C H

32

H C C C

H

H

H

H

H

H

CH H

H

4

H C C C

H

H

H

H

H

C

H

H

H

CH H

H

5

H C C C

H

H

H

H

H

H

CH H

H

H HC C

C

C

H

H

H

HH H

H H

H

H

C

Which three hydrocarbons are isomers of each other?

A 1, 2 and 4 B 2, 3 and 5 C 2, 3 and 4 D 3, 4 and 5 38 Which alcohol and acid will react together to make the ester CH3COOC2H5?

A CH3OH and CH3COOH

B CH3OH and C2H5COOH

C C2H5OH and CH3COOH

D C2H5OH and C2H5COOH

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© UCLES 2017 5070/12/O/N/17

39 Which compound has a pH of less than 7 in aqueous solution?

O

C

H C O

OH C C H

H

H

A

H O C

H

H

H

B

O

C

C

O H

H

D

H

O

C

O C

C

C

H

H

H

H

H

H

H

H

40 Which statement about polymers is correct?

A Nylon and Terylene are produced by addition polymerisation.

B Nylon and Terylene both contain the amide linkage.

C Simple sugars can be produced by hydrolysing proteins.

D Starch contains the elements carbon, hydrogen and oxygen.

15

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk after the live examination series. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2017 5070/12/O/N/17

BLANK PAGE

16

© UCLES 2017 5070/12/O/N/17

Gro

up

The

Perio

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Tabl

e of

Ele

men

ts

1 Hhy

drog

en1

2 He

heliu

m4

III

IIIIV

VV

IV

IIV

III

3 Lilit

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4 Be

bery

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9

atom

ic n

umbe

r

atom

ic s

ymbo

l

Key

nam

ere

lativ

e at

omic

mas

s

11 Na

sodi

um23

12 Mg

mag

nesi

um24

19 Kpo

tass

ium

39

20 Ca

calc

ium

40

37 Rb

rubi

dium

85

38 Sr

stro

ntiu

m88

55 Cs

caes

ium

133

56 Ba

bariu

m13

7

87 Frfra

nciu

m–

88 Ra

radi

um –

5 B boro

n11 13 Al

alum

iniu

m27 31 Ga

galli

um70 49 In indi

um11

5

81 Tlth

alliu

m20

4

6 Cca

rbon

12 14 Si

silic

on28 32 Ge

germ

aniu

m73 50 Sn tin 119

82 Pb

lead

207

22 Titit

aniu

m48 40 Zr

zirc

oniu

m91 72 Hf

hafn

ium

178

104

Rf

ruth

erfo

rdiu

m–

23 Vva

nadi

um51 41 Nb

niob

ium

93 73 Tata

ntal

um18

1

105

Db

dubn

ium

–

24 Cr

chro

miu

m52 42 Mo

mol

ybde

num

96 74 Wtu

ngst

en18

4

106

Sg

seab

orgi

um–

25 Mn

man

gane

se55 43 Tc

tech

netiu

m– 75 Re

rhen

ium

186

107

Bh

bohr

ium

–

26 Fe iron

56 44 Ru

ruth

eniu

m10

1

76 Os

osm

ium

190

108

Hs

hass

ium

–

27 Co

coba

lt59 45 Rh

rhod

ium

103

77 Iriri

dium

192

109

Mt

mei

tner

ium

–

28 Ni

nick

el59 46 Pd

palla

dium

106

78 Pt

plat

inum

195

110

Ds

darm

stad

tium

–

29 Cu

copp

er64 47 Ag

silv

er10

8

79 Au

gold

197

111

Rg

roen

tgen

ium

–

30 Zn zinc 65 48 Cd

cadm

ium

112

80 Hg

mer

cury

201

112

Cn

cope

rnic

ium

–

114 Fl

flero

vium

–

116

Lvliv

erm

oriu

m–

7 Nni

troge

n14 15 P

phos

phor

us31 33 As

arse

nic

75 51 Sb

antim

ony

122

83 Bi

bism

uth

209

8 Oox

ygen

16 16 S sulfu

r32 34 Se

sele

nium

79 52 Tete

lluriu

m12

8

84 Po

polo

nium

–

9 Fflu

orin

e19 17 Cl

chlo

rine

35.5

35 Br

brom

ine

80 53 Iio

dine

127

85 At

asta

tine

–

10 Ne

neon 20 18 Ar

argo

n40 36 Kr

kryp

ton

84 54 Xe

xeno

n13

1

86 Rn

rado

n–

21 Sc

scan

dium

45 39 Yyt

trium 89

57–7

1la

ntha

noid

s

89–1

03ac

tinoi

ds

57 Lala

ntha

num

139

89 Ac

lant

hano

ids

actin

oids

The

volu

me

of o

ne m

ole

of a

ny g

as is

24

dm3 a

t roo

m te

mpe

ratu

re a

nd p

ress

ure

(r.t.p

.).

actin

ium

–

58 Ce

ceriu

m14

0

90 Th thor

ium

232

59 Pr

pras

eody

miu

m14

1

91 Pa

prot

actin

ium

231

60 Nd

neod

ymiu

m14

4

92 Uur

aniu

m23

8

61 Pm

prom

ethi

um– 93 Np

nept

uniu

m–

62 Sm

sam

ariu

m15

0

94 Pu

plut

oniu

m–

63 Eu

euro

pium

152

95 Am

amer

iciu

m–

64 Gd

gado

liniu

m15

7

96 Cm

curiu

m–

65 Tb terb

ium

159

97 Bk

berk

eliu

m–

66 Dy

dysp

rosi

um16

3

98 Cf

calif

orni

um–

67 Ho

holm

ium

165

99 Es

eins

tein

ium

–

68 Er

erbi

um16

7

100

Fm ferm

ium

–

69 Tm thul

ium

169

101

Md

men

dele

vium

–

70 Yb

ytte

rbiu

m17

3

102

No

nobe

lium

–

71 Lu lute

tium

175

103 Lr

law

renc

ium

–